<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

<form class="form-horizontal" action="email" method="get">
<div class="form-group">
    <div class="col-sm-offset-2 col-sm-10">
      <h1>绑定邮箱</h1>
    </div>
  </div>
  <div class="form-group">
    <label for="inputEmail3" class="col-sm-2 control-label">邮箱</label>
    <div class="col-sm-10">
      <input type="text" class="form-control" name="email" placeholder="Email">
    </div>
  </div>
  <input type="hidden" name="id" value="1" >
  <div class="form-group">
    <div class="col-sm-offset-2 col-sm-10">
      <button type="submit" class="btn btn-default">绑定</button>
    </div>
  </div>
</form>